st: obtaining bootstrapped variance covariance matrix using version 6

Hi. I am using the bstrap command in version 6 to obtain bootstrapped
standard errors. However, I wish to obtain the entire bootstrapped
variance covariance matrix. After the bstrap command I typed matrix V =
e(V) and then matrix list V, but the matrix I get does not appear to be the
correct one (the square root of the variances in this matrix do not give me
the bootstrapped standard errors). I'd appreciate any advice on this.
Thank you!